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69c9820d40
With the right setup S3 cards can display 1 and 2 BPP packed pixel modes, even in high resolutions. So this patch makes them available. The 4 BPP packed pixel mode had one pixel column of garbage on the left side due to how the shift register works, this is fixed now. There was a limitation that only 8 pixel wide fonts could be used at 4 BPP. Since the CFB routines were updated to handle reverse pixel ordering correctly that limitation doesn't exists and was removed now. In 4 BPP interleaved planes mode font widths of multiply of 8 are accepted now, not just 8 pixels. The horizontal screen position will not move as much between modes as it used to. That was caused by the various amount of pipeline delay which is compensated now as much as possible. While adjusting the code direct port access of PEL registers was corrected. Should work now on systems where these are memory mapped. I've noticed that when in 1 BPP mode the console is used with Unicode fonts erasing might be done with non-blanks. That's a bug in the VT code and so not part of this patch. Signed-off-by: Zsolt Kajtar <soci@c64.rulez.org> Signed-off-by: Helge Deller <deller@gmx.de> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.